Electric lock



(No Model.) 2 she tssneee 1.

- W. s. NASH. ELECTRIC LOOK.

No. 567,156. Patented Sept 8, 1896.

INVENTOR m: ncnn PETERS co Pnoroumd, WASHINGTON. u. c

2 Sheets-Sheet 2.

(No Model.)

- W.S.'NASH. ELECTRIC LOCK. No. 567,156; I Patented Sept. 8, 1896.

7'- XNVENTOR WITNESSES UNITED STATES PATENT QEEI E.

\VALTER S. NASH, OF KNOXVILLE, TENNESSEE.

ELECTRIC LOCK.

SPECIFICATION forming part of Letters Patent No. 567,156, dated. September 8, 1896. Application filed November 21, 1895. Serial No. 569,703. (No model.)

T0 60% whom it may concern.-

Be it known that I, WALTER S. NASH, a citizen of the United States, residing at Knoxville, in the county of Knox and State of Tennessee, have invented certain new and useful Improvements in Door-Locks and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification.

My invention relates to door looks or latches, and more particularly to that class of locks having latch-bars which may be operated from within a house or closure, but can only be made operative from without at the will of a person within the room or building the door of which is so closed, by means of an electric current operated from a distance, as, for instance, by the pressure of a push-button in the oflice of an apartment-house or hotel, or in the lobby of a theater, and is especially adapted to be applied to the exitdoors of theaters or to the doors of rooms in hotels and apartment-houses and the like, where it is desirable that all doors may be quickly unlocked, especially in an emergency, from some central and accessible station.

In carrying out these objects my invention consists of a latch bar or bolt, a lock-bar or underbolt interlocking therewith, a springimpelled dog engaging the lock-bar, a device for operating said dog, and an electromagnet for releasing the device, whereby the dog may be disengaged from the lock-bar and th lock be released. 7

It also consists of a latch bar or bolt with an interlocking lock-bar or underbolt, a springimpelled dog engaging in a notch in the lockbar, a spring-actuated trip engaging the dog, an arm upon one side of the trip en gaging the upper arm of an elbow-armature, an electromagnet so arranged that when the magnet is energized the trip is released from its en gagement with the elbow-armature, thus disengaging the dog from the lock-bar, releasing the lock.

It further consists in certain other novel combinations constructions, and arrangements of parts, as will be clearlyset forth and claimed.

Of the accompanying drawings, forming a part of this specification, Figure 1 represents a view of the interior ofa latch-lock embodying my invention, showing the normal positions of all parts when the door is locked. Fig. 2 represents the same, save that here the latch-bar and its actuating spring-lever are removed to show more fully the lock-bar and locking mechanism. Fig. 3 represents the same, except that here the locking device is withdrawn from the lock-bar, the latter now being responsive to the outer door-knob. Figs. 4 and 5 illustrate the form and construction of the lock-bar. Figs. 6, '7, 8, and 9 are illustrative of the form and construction of the latch-bar. Fig. 10 shows the latch and lock bars combined and interlocked in. their normal positions. Fig; 11- represents the same, save that here the latch-bar is retracted independently, as when it has responded to the rotation of the inner door-knob. Figs. 12 and 13 illustrate the construction and mode of operation of the spring-trip with reference to its actuating-spring and the lock-casing, respectively. v In the drawings, 0 represents the lock-casing, 0 and 0 representing screw-sleeves for attaching cover to lock and lock to door, respectively.

L is the latch-bar, provided with the inwardly-projecting shoulders n, which furnish a fulcrum for the inner knob-tumbler f, and with the notch H into which engages the head of the spring-lever H, which is of the ordinary form and construction. The latchbar L is provided also with the head y and neck W. The dog D is pivoted to the lockcase at D and is provided with the arms D and D and with the spring S, which being sprung by-the post S exerts a downward impulse to the dog-arm D thereby elevating dog-arm D, as is apparent. The trip tis p'rovided with the eccentric or cam t and-with the arms i and 29*. Trip T is pivoted to the lock-case at t and contains a coil-spring, attached to the inner wall of the trip and to the pivot at t and 15, respectively, Fig. 12, by which the trip is actuated to the front.

g, g, and g are the outer knob-tumbler,

being so adapted that the inner knob-tumbler f is loosely soekcted into said tumbler g, so that both tumblers are independent in their action.

A is an elbow-armature pivoted to the lockcase at a and provided with the spring c of ordinary form, actuating said elbow-armature upward and to the front, and with the notch a (t is the upright arm of said elbow-armature A and is preferably curved, as shown, in order to economize space, to render the armature more sensitive, and to give full play to trip-arm The electromagnetsm are of the usual form and are provided with the wires w and poles p. The lock-bar B is provided with the slot R, within which are the pivots D and i of the dog and trip, respectively, with the projections k, which afford a fulcrum for the knob-tumbler g, and with the notch W, in to which engages dog-arm d thus locking the door from the outside. Into the groove B of the lock-bar slides the mitershaped portion L of the latch-bar when the latch-bar is retracted, and by the interlocking of the knobs or projections of the lock-bar with the shoulders b of the latch-bar the latch-bar is retracted with the lock-bar, as is apparent. lVhen the door is latched, it will be observed that the shoulders '12 rest upon the projections 7a. The miter-back L is enveloped by the sleeve b and the knobs 70 project through the wells 2 and interlock with the shoulders 6 The latch-bar L is also provided with a groove L in order that when it is being retracted it may clear the head of the trip-pivot t.

V is a spring-actuated slide-catch pivoted at t, which when pushed up depresses the armature A by means of the lever-arm r operating at a whereby the trip T is released and dog-arm (Z disengages from notch 70 thus unlocking the door permanently, or until the slide-catch is depressed to its normalposition. The slide-catchu and accessories are of course only adaptable to a rim-lock.

In mortise-locks the spur or shank :0, forming a part of the dog-arm d, and the slidecatch 50 and accessories (pivoted lever 00 lever-arm w, and actuating-spring 00 are designed to afford a means for disconnecting the locking mechanism by disengaging dogarm d from the lock-bar B at will. It will be apparent that but one form of such disconnecting mechanism will be required in either a rim or a mortise lock.

The operation of the device is as follows: The mechanism being in the position shown in Figs. 1 and 2, the pressure of a push-button in the central station, as, forinstance, in the oflice of a hotel or apartment house, closes a circuit through the poles p and the electromagnet m, causing the latter to attract the elbow-armature a, thus releasing the trip t. The trip If, pivoted to the lock-ease at 25', contains a coil-spring 25', attached to the pivot t and to the inner wall of the trip t, which actuates trip 6 to the position in Fig. 3 where it is stopped by the pin or lugP engaging with the trip-arm The revolution of the trip causes the periphery of the eccentric to lift the upper arm (1 of the dog D, which being pivoted at d to the lock-case withdraws the end of the dog-arm d from the notch 70 in the lock-bar B, freeing the same and rendering it movable in connection with the rotation of the outer knob-tumbler g, which engages with the projections 70, so that when the lock-bar B is retracted by the rotation of the knob-tumbler g the knobs 7c engage the shoulders b of the latch-bar L. The latchbar L is also retracted and the door swings free. The locking mechanism is automatic in this: The turning of the outer knob rotates the outer knob-tumbler g, retracting the lock and latch bars, as shown. The lockbar B is provided with the pin or lug P, against which bears trip-arm i when the lockin g mechanism is disconnected from lockbar B, as shown in Fig. 3. Hence when the lock-bar is retracted, pin or lug P, bearing on trip-arm 25 as described, reverses the trip '1, whereby trip-arm t is forced along the arm a of the armature a, which, having been demagnetized by the breaking of the circuit when the pressure is removed from the pushbutton, has been impelled to its normal position, Figs. 1 and 2, by the spring a so that when the lock and latch bars have been fully retracted trip-arm t has passed the upper extremity of the armature-arm a, slightly depressing same in transit. When the outer knob is released, the latch-bar L and the lock-bar B, which is interlocked with the latch-bar by the engagement of the knobs 7G and the shoulders 21 are pulled forward to their normal positions, Fig. 1, by the springimpelled latch-lever h, which is soekcted into the latch-bar L at h". Trip 25, however, has passed above and beyond armature-arm a and on its return-armature at having returned to its normal position, Figs. 1 and 2, trip-arm t reengages with armature, arm a, thus automatically resetting the trip, while the reversing of the trip thas at the same time released the dog D, the dog-arm (1 being forced into the notch k of the lock-bar B by the action of the spring 5 on dog-arm d at s when the lock and latch bars have regained their normal positions, as in Figs. 1 and 2. Latch-bar L and lock-bar B form when united a compound latch or bolt, so constructed, as shown by the details, Figs. 4 to 11, inclusive, that the latch-bar L moves freely within and upon the 1ock-bar B, and can be at all times retracted by the rotation of the inner knobtumbler f, which is loosely soekcted into but works wholly independently of the outer knob-tumbler g, the door being thus always unlocked from within, a turn of the inner door-knob rotating the tumbler f and retracting the latch-bar.

can at all times be controlled from within at will,because in a rim-lock, if the slide-catch n, which is attached to and projects through the The locking mechanism rear end of the lock, be pushed up the arm '0 of the spring-lever 12 engages notch a in the 00 attached to and projecting from or rather through the face of the lock, which, when pushed up, depresses the arm 50'' of the springlever 00 which engages with'the spur or shank 00, attached to or forming a part in mortiselocks of the arm 01* of the dog D, and withdraws dog-arm (Z from its engagement with the lock-bar B in the notch rendering the lock-bar operative, as before indicated. It will be observed that when arm d of the dog D is disengaged from the notch 10 of lock-bar B the lock-bar is at all times responsive to the 1 Hence, as it follows outer knob -tumbler. that when the lock-bar B is retracted it withdraws with it the latch-bar L, when the lock-,

in g mechanism isdisconnected from the lockbar B the rotation of the outer door-knob re-' tracts the lock and latch bars and permits the 3 door to swing freely.

Having described my invention and its operation, I claim- 1. In a door-lock, the combination of a latch bar or bolt, a head portion and a neck portion of the said latch bar or bolt and laterally-projecting shoulders at one end of said latch-bar, and lateral projections at the other lateral projections at one end of said lock-bar adapted to engage and interlock with the laterally-projecting shoulders of the latch-bar and lateral projections at the other end of the said lock-bar, an outer knob-tumbler engaging with the said lateral projections of the lock-bar, an inner knob-tumbler acting independently of said outer knob-tumbler and engaging the lateral projections on the latchbar, and means for locking and unlocking the lock-bar, substantially as described.

2. In a door-lock, the combination of a latch-bar, or bolt, and a lock-bar, or underbolt, interlocking therewith, a spring impelled dog engaging the lock-bar, a device for operating said dog and an electromagnet for releasing the device, whereby the dog may be disengaged from the lock-bar and the lock be released, substantially as described.

In a door-lock, the combination of a latch-bar, or bolt, with an interlocking lockbar, or underbolt, a spring-impelled dog en-- gaging in a notch in the lock-bar, a springactuated trip engaging the dog, an arm upon one side of the trip engaging the upper arm of an elbow-armature, and an electromagnet so arranged that when the magnet is energized the trip is released from its engagement with the elbow-armature, disengages the dog from the lock-bar, thus releasing the lock, substantially as described.

4:. In a door-lock, the combination of a latch-bar, or bolt, with an interlocking lockbar, or underbolt, a spring-impelled dog engaging in a notch in the lock-bar, a springactuated trip which automatically operates the dog when released, and is adapted to be moved to its-normal position bythe operation of the lock, an elbow-armature engaging the trip and an electromagnet controlling said armature, substantially as described.

5. In .a door-lock, the combination of a sliding latch-bar, or bolt, an interlocking lock-bar, or underbolt, a notch in the side of the lock-bar, one arm of a spring-actuated trip engaging the notch and the other arm engaging the periphery of an eccentric on, or a cam projecting from, a spring-impelled trip, an arm on said trip engaging the upper arm of an elbow-armature controlled by an electromagnet, and another arm on said trip adapted, when the trip is released and the locking mechanism is disconnected, to engage with a stud or lug provided .011 the lock bar, so that when the lock-bar is retracted the backward pressure of "the stud or lug reverses the trip, so that, when the lock-bar is fully retracted, the trip ai'm, which normally engages the elbow-armature, has passed beyond the upper end of said elbow-armature, slightly depressing it in transit, consequently, when the lock-bar is released and is carried forward 'bythe action of the latchbar, the upper trip-arm springs forward to its normal engagement with the upper arm of said elbow-armature, setting the lock, substantially as set forth.

6. In a door-lock, the combination of a latch-bar, or bolt, with an interlocking lockbar, or underbolt, a notch in the side of the lock-bar, a pivoted spring-impelled dog, one

arm of which normally engages the notch in the lock-bar and the other engaging the periphery of the eccentric of a pivoted springactuated trip, an arm attached to the side of the trip engaging with the upper arm of a pivoted spring-actuated elbow-armature controlled by an electromagnet, another arm at tached to the lower side of the trip a stud or lug projecting from the top of the lock-bar, and conducting-wires extending to a distant point, the whole apparatus being so arranged that the closing of an electric circuit through the electromagnet disconnects the locking mechanism from the lock-bar rendering it operative, while the retraction of the lock-bar and the latch-bar, interlocked as set forth, automatically resets the lock, substantially as set forth.

7. The combination of a spring-actuated slide-catch, a pivoted lever controlled thereby and engaging with the lower arm of the elbow-armature, the whole arranged so as to depress the elbow-armature and disconnect the locking mechanism, as set forth.

8. The combination of the spring-actuated IIO slide-catch, a pivoted lever controlled thereby and engaging a spur or shank attached to, or forming a part of the pivoted dog, the whole arranged so as to disconnect the locking mechanism from the lock-bolt, as set forth.

9. In a door-lock; the combination of an outer knob-tumbler, an inner knob-tumbler loosely socketed therein, a movable latch bar or bolt provided with projections 011 the under side thereof, forming a fulcrum for said inner knob-tumbler, and with a spring impelled lever actuating said latch-bar to the front, a lock-bar or underbolt, interlocking with said latch-bar, provided with knobs or projections on the top thereof, which engage projecting shoulders of the latch-bar a neck to said latch-bar and a sleeve or recess in said lock-bar, whereby said latch bar or bolt moves freely and independently within and upon said lock-bar or underbolt, projections on the rear end of the lock-bar forming a fulcrum for the outer knob-tumbler, a notch in the side of the lock-bar or underbolt, a pivoted spring-impelled dog, one arm of which normally engages the notch in the lock-bar or underbolt the other arm engaging the periphery of the eccentric, or a cam, of a pivoted springimpelled trip, an arm attached to the rear of the trip engaging the upper arm of a pivoted spring-actuated elbow-armature regulated by a set-screw and controlled by an electromagnet, another arm attached to the lower side of the trip, a stud or lug projecting from the face or upper side of the lock-bar or underbolt, conducting-Wires extending to some central station, the springactuated slide -catch, a pivoted lever controlled thereby engaging with a notch in the lower arm of the elbow-armature, as and for the purposes set forth.

' 10. In a door-lock, the combination of an outer knob-tumbler, an inner knob-tumbler loosely socketed therein, a movable latchbar, or bolt, provided with projections on the under side thereof, forming a fulcrum for said inner knob-tumbler, and with a springimpelled lever actuating said latch-bar to the front, a lock-bar, or underbolt, interlocking with said latch-bar, provided with knobs or projections on the top thereof, which engage projecting shoulders of the latch-bar, a neck to said latch-bar and a sleeve or recess in said lock-bar whereby said latch bar or bolt moves freely and independently Within and upon said lock-bar or underbolt, projections on the rear end of the lock-bar forming a fulcrum for the outer knob-tumbler, a notch in the side of the lock-bar or underbolt, a pivoted spring-impelled dog, one arm of which normally engages in the notch in the lockbar or underbolt, the other arm engaging the periphery of the eccentric, or a cam, of a pivoted spring-impelled trip, an arm attached to the rear of the trip engaging the upper arm of a pivoted spring-actuated elbow-armature regulated by a set-screw and controlled by an electromagnet, another arm attached to the lower side of the trip, a stud or lug projecting from the face or upper side of the lockbar, or underbolt, conducting vires extending to some central station, and the spring-actuated slide-catch, a pivoted lever controlled thereby and engaging with a spur or shank attached to, or forming a part of, the pivoted dog, as and for the purposes set forth.

In testimony whereof I aflix my signature in presence of two Witnesses.

WALTER S. NASH.

Witnesses:

R. H. SIMMoNDs,

Row. L. Lorrrs. 

